Method of producing phosphatic materials



sand and other in1purities to p ss therethrough and not the phosphatic materi31 6 The rocess which consists in mixin a mass of ph0sphatic nateTial sand and other i!npurities which exist in pafticles of substantially the same size, With an emu1sion of oil, soap and water, then passing the Inass so treated over an in clined screen Subnlerged in vvater and of a' !nesh size perInitting the sand and ilnpurities to pass therethrough and the phosphatic naterial to pass there0ver` 7- The p1'ocess which consists in Inixing a Inass of phosphatic Inateria], Sand and other ilpurities which exist in particles of Substantially the Sanle size, with oil, then passing the Inass so treated over an inclined Screen subInerged in water and of a nlesh size pern1itting the Sand and ilT1purities to pass therethrough and the ph0sphatic Inaterial t0^pass thereover.

8- The process which consists' in Zixing a mass of phosphatic material, sand and other impurities which exist in particles of Substantia1y the saIne size, With an eInulsion of oil, then passing the Inass so treated over an inclined screen sublnerged in water and of a mesh Size pern1itting the Sand and inlpurities to pass therethrough and the phosphatic 11ateria'l t0 pass thereover( 9. 'I'he nlethod of Separating the silicious and phosphatic constituents of fine1 Ilineral phosphates which COInprises, 0iling said ne I1i1eral phosphates, Supplying said nineral to a sc1een under vvater, and ilnparting reative motion to said screen and nlineral, whereupon the silicious constituents of the ineral pass through the screen and the ph0sphatic constituents there0f nlove along the screen under the water 10. The method of separating the silicious and phosphatic constituents of ne phosphate mineral which comprises, 0iling said n1ineral supplying Said !nineral to the upper end of an inclined screen under water, and ilnparting Tea tive n10tionto said screen and the nlinera, Whereupon the silicious constituents of the I1i1- era pass through the screen and the phosphatic constituents thereof nlove downvvard along the screen under the surface`of the water. 10

11- I11e method of separating the silicious and ph0sphatic c0nstituents of Iine Ininera1 phoS- phates which compnses, oiling said ne minera1 phosphates, supplying said n1ineral to a screen under vvater, Said screen having holes larger 16 than the greater part of the phosphatic con tit-' uents, and ilnparting relatve nlotion t0 Said Screen and ninera, Whereupon he silicious con- Stituents of the Ininera1 pass thfough the screen and tl e phosphatic constituents there0f Ilove 20 along the Screen under the water 12' The method of Separating the silicious and phosphatic constitutents of ne phosphate T1ineral vvhich con1prises, 0iling said ninera1, Sup plying said Inineral to the upper (I1d of an in- Clined Screen under vva'te1-, Said screen having holes larger than the greater par of the phos phatic constituents, and ilnparting relative nlo tion to said Screen and the nlineral, whereupon the silicious constituents of the nlinera1 pass 30 through the Screen and the phosphatic constit uents the e0f nlove dovvnvvard' along the Screen under the surface of the vvater.

GEORGE H. 1-/ICCOY. DAvID M. WRIGHT. J. PANKEY HALL. 

